Answer:
a=7.85-1/2^b
Step-by-step explanation:
2a=15.7-b Move variable to the right side and change its sign
2a=15.7-b Divide both sides of the equation by 2
a=7.85-1/2^b The final solution for a is
15 degrees hope this helps mark as brainliest
The simplified expression of
is 
<h3>Complete question</h3>
Simplify the expression: (x³ + (-y)³) / (x - y)
Do not include parentheses in your answer.
<h3>How to simplify the expression?</h3>
The expression is given as:

Open the inner bracket

Apply the difference of two cubes to the numerator

Cancel out the common factors

Hence, the simplified expression of
is 
Read more about expressions at:
brainly.com/question/723406
#SPJ1
Cos35= y/15
y= 15cos35
y= 12.3 cm
The ratio of height : shadow =44/1313
Therefore height of the tree,x=3434*(44/1313)
=115.08 ft
If you meant 13 and 34 as the length of shadows respectively, then also x=115.08 ft